/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
 *                2007, 2008, 2009  Free Software Foundation, Inc.
 *
 *  GRUB is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

/* Contains elements based on gcrypt-module.h and gcrypt.h.in.
   If it's changed please update this file.  */

#ifndef GRUB_CIPHER_HEADER
#define GRUB_CIPHER_HEADER 1

#include <grub/symbol.h>
#include <grub/types.h>

typedef enum 
  {
    GPG_ERR_NO_ERROR,
    GPG_ERR_BAD_MPI,
    GPG_ERR_BAD_SECKEY,
    GPG_ERR_BAD_SIGNATURE,
    GPG_ERR_CIPHER_ALGO,
    GPG_ERR_CONFLICT,
    GPG_ERR_DECRYPT_FAILED,
    GPG_ERR_DIGEST_ALGO,
    GPG_ERR_GENERAL,
    GPG_ERR_INTERNAL,
    GPG_ERR_INV_ARG,
    GPG_ERR_INV_CIPHER_MODE,
    GPG_ERR_INV_FLAG,
    GPG_ERR_INV_KEYLEN,
    GPG_ERR_INV_OBJ,
    GPG_ERR_INV_OP,
    GPG_ERR_INV_SEXP,
    GPG_ERR_INV_VALUE,
    GPG_ERR_MISSING_VALUE,
    GPG_ERR_NO_ENCRYPTION_SCHEME,
    GPG_ERR_NO_OBJ,
    GPG_ERR_NO_PRIME,
    GPG_ERR_NO_SIGNATURE_SCHEME,
    GPG_ERR_NOT_FOUND,
    GPG_ERR_NOT_IMPLEMENTED,
    GPG_ERR_NOT_SUPPORTED,
    GPG_ERROR_CFLAGS,
    GPG_ERR_PUBKEY_ALGO,
    GPG_ERR_SELFTEST_FAILED,
    GPG_ERR_TOO_SHORT,
    GPG_ERR_UNSUPPORTED,
    GPG_ERR_WEAK_KEY,
    GPG_ERR_WRONG_KEY_USAGE,
    GPG_ERR_WRONG_PUBKEY_ALGO,
  } gcry_err_code_t;

enum gcry_cipher_modes 
  {
    GCRY_CIPHER_MODE_NONE   = 0,  /* Not yet specified. */
    GCRY_CIPHER_MODE_ECB    = 1,  /* Electronic codebook. */
    GCRY_CIPHER_MODE_CFB    = 2,  /* Cipher feedback. */
    GCRY_CIPHER_MODE_CBC    = 3,  /* Cipher block chaining. */
    GCRY_CIPHER_MODE_STREAM = 4,  /* Used with stream ciphers. */
    GCRY_CIPHER_MODE_OFB    = 5,  /* Outer feedback. */
    GCRY_CIPHER_MODE_CTR    = 6   /* Counter. */
  };

/* Type for the cipher_setkey function.  */
typedef gcry_err_code_t (*gcry_cipher_setkey_t) (void *c,
						 const unsigned char *key,
						 unsigned keylen);

/* Type for the cipher_encrypt function.  */
typedef void (*gcry_cipher_encrypt_t) (void *c,
				       unsigned char *outbuf,
				       const unsigned char *inbuf);

/* Type for the cipher_decrypt function.  */
typedef void (*gcry_cipher_decrypt_t) (void *c,
				       unsigned char *outbuf,
				       const unsigned char *inbuf);

/* Type for the cipher_stencrypt function.  */
typedef void (*gcry_cipher_stencrypt_t) (void *c,
					 unsigned char *outbuf,
					 const unsigned char *inbuf,
					 unsigned int n);

/* Type for the cipher_stdecrypt function.  */
typedef void (*gcry_cipher_stdecrypt_t) (void *c,
					 unsigned char *outbuf,
					 const unsigned char *inbuf,
					 unsigned int n);

typedef struct gcry_cipher_oid_spec
{
  const char *oid;
  int mode;
} gcry_cipher_oid_spec_t;

/* Module specification structure for ciphers.  */
typedef struct gcry_cipher_spec
{
  const char *name;
  const char **aliases;
  gcry_cipher_oid_spec_t *oids;
  grub_size_t blocksize;
  grub_size_t keylen;
  grub_size_t contextsize;
  gcry_cipher_setkey_t setkey;
  gcry_cipher_encrypt_t encrypt;
  gcry_cipher_decrypt_t decrypt;
  gcry_cipher_stencrypt_t stencrypt;
  gcry_cipher_stdecrypt_t stdecrypt;
} gcry_cipher_spec_t;

struct grub_cipher
{
  struct grub_cipher *next;
  const char *name;
};
typedef struct grub_cipher *grub_cipher_t;

extern grub_cipher_t EXPORT_VAR (grub_ciphers);
void EXPORT_FUNC(grub_burn_stack) (grub_size_t size);


#endif